Oil-can pump.



PATENTED JULY 12, 1904.

R. W. LAMBERT.

.OIL CAN PUMP.

APPLIUATION FILED MAR. 11, 1904.

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Patented July 12, 1904.

UNITED STATES PATENT OFFICE.

ROBERT \VARREN LAMBERT, OF TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS,TOTHE DELPHOS CAN COMPANY, OF DELPHOS, OHIO,

A CORPORATION OF OHIO.

OIL-CAN PUMP.

SPECIFICATION forming part of Letters Patent No. 764,732, dated July 12,1904. ApplicatinnfileilMarehll,1904. Serial No. 197,666. on) model.)

To all whom, it may concern.-

Be it known that I, ROBERT WVARREN LAM- BERT, a citizen of the UnitedStates, residing at Toledo, in the county of Lucas and State of Ohio,have invented a new and useful Oil- Can Pump, (Case 13,) of which thefollowing is a specification.

My invention relates to pumping apparatus primarily intended for use inconnection with oil-tanks for the purpose of pumping oil from the latterinto lamp-fonts of that type in which means are provided forautomatically preventing the overflow of the latter.

The object is to provide a simple structure wherein a single cylinder isemployed in connection with a single discharge and return pipe and apositive discharge as well as a positive return of the liquid is securedthrough said pipe by means located in said single cylinder.

Two embodiments of the invention are illustrated; but said invention isnot limited to these, as it will be evident that modifications of bothmay be made without departing from the spirit or scope of the inventionas set forth in the appended claims.

In the drawings, Figure 1 is a side elevation of one embodiment of theinvention. Fig. 2 is a vertical sectional view through the same. Fig. 3is a side elevation of the other embodiment. Fig. I is a verticalsectional view through the same.

Similar reference-numerals indicate corresponding parts in all thefigures of the drawings.

Referring to the structure illustrated in Figs. 1 and 2, it will benoted that the usual screw-cap 5 is shown, which is adapted to beinserted in the top of an oil-can andhas sus- 4 der is preferably ofcomparatively great di- V ameter when considered with respect to thosepended therefrom a cylinder 6, which cylinordinarily employed. The upperend of the cylinder is preferably open and under ordinary conditions iscovered by a screw-cap 7 Substantially midway between the ends of thecylinder is located a transverse partition 8, subdividing'said cylinderinto a lower barrel 9 and an upper barrel 10, which are thus disposed intandem. A single discharge and return pipe is employed, comprisingtelescoped sections 11 and 12, said pipe extending through the screw-cap5, the upper section being provided with a depending spout or nozzle 13.The lower end of said upper section is furthermore provided with aboxing 14, containing packing 15, that prevents leakage between thesections. Operating longitudinally in the cylinder is a piston-rod 16,that passes through the partition 8 and carries separate pistons 17 and18, that operate, respectively, in the barrels 9 and 10. The piston-rod16 extends through the cap 7 of the cylinder and is provided with asuitable handle 19. The lower barrel and its piston constitute the meansfor discharging the liquid from the can, and said barrel is thereforeprovided with a bottom 20, having an inletopening 21 therethrough. Apartition 22, located a slight distance above the bottom 20, has aseries of openings 23 therethrough. In the compartment formed by thebottom and partition 22 is located an inwardly-opening valve 24:, thatis adapted to cover the opening 21 but not the openings 23. Adischargeconduit 25 leads from the bottom of the lower barrel 9 to thelower end of the discharge and return pipe, said conduit including inits structure a valve-casing '26, containing an outwardly-opening valve27, adapted to close the inlet-orifice in the bottom of said casing, butnot the outlet therefrom, which outlet preferably is located in adiaphragm or partition 28, formed in the casing 26, the upper end ofsaid casing constituting a support for and having secured directly to itthe lower end of the pipe-section 11. A return-conduit 29 leads from thevalve-casing 26 above the partition 28 and terminates at its upper endin a valve-casing 30. Said casing 30 is subdivided into threecompartments by two intermediate spaced diaphragms 31, each having anopening 32 therethrough. In the lower compartment of the casing islocated an upwardly or inwardly opening valve 33, while 34 and throughthe outlet 35.

in the upper compartment is arranged an up:

wardly or outwardly opening valve 34, said upper compartment having anoutlet-opening 35 in its top. Theintermediat'e compartment communicates,by means of apassage-way 36, with the lower end of the upper pump-barrel10, which pump-barrel and its piston constitute the means for effectingthe return of the liquid through the single discharge and return pipe.The operation of this pump is as follows: WVhen the screw-cap is securedin the top of a can, the pump-cylinder 6 will be suspended therein, withits lower end a slight distance above the bottom of the can. Upon anupward stroke of the piston-rod it will be clear that oil or liquid isdrawn through the bottom inlet of the lower barrel and-will consequentlyfill said barrel. At the same time the upward movement of the upperpiston creates a partial vacuumin the lower portion of the upper barrel10. This vacuum is supplied by air flowing downwardly through the singledischarge and return pipe, thence upward through the conduit 29, pastthe valve 33 into the intermediate compartment of the valve-casing 30,and thence through the passage-way 36 to the barrel. Upon the returnstroke the liquid in the lower barrel must of necessity pass through theconduit 25 into the discharge and return pipe and thence to the lamp orvessel to be filled. At the same time the air drawn by the piston 18into the upper barrel will be expelled past the valve This operation iscontinued until the level of the liquid reaches the discharge end of thespout 18, whereupon it will be evident that upon the upward strokeinstead of air being drawn through the single pipe liquid will bereturned. It will therefore be seen that a simple nonoverflow pump issecured having a single cylinder and a single discharge and return pipewhich efliciently performs both functions,the whole being capable ofbeing cheaply manufactured.

The embodiment illustrated in Figs. 3 and 4 is very similar to thatalready described. The same pump-barrel 6is employed, having anintermediate partition 8, the single pistonrod 16, with the separatepistons 1'?" and 18 operating, respectively, in the lower and upperbarrels 9 and 10, formed by the partition 8. A single discharge andreturn pipe, consisting of sections 11 and 12, is employed, which pipeis respectively connected with the discharge and return pumpbarrels.These connections are in the present instance constructed as follows: Avalve-casing 37 is employed having intermediate partitions 38, providedwith passage-ways 39 therethrough. These partitions subdivide theinterior of the casing into three compartments, and the lower end of thesection 11 of the discharge and return pipe is connected andcommunicates with the intermediate compartment. The lower pump barrel 9has the usual valved inlet 24, and an outlet-conduit 40 connects thelower end of said barrel 9 with the bottom of the lower compartment ofthe casing 37. Within the lower compartment is placed an upwardly oroutwardly opening-valve 41. The upper compartment of the casing 37 has acommunication through its top with the conduit 42, leading to the bottomof the upper barrel 10, the passage-way through this conduit beingcontrolled by an upwardly or inwardly opening valve 43. An outlet 44,formed in the lower end of the barrel 10, is controlled by anoutwardly-opening valve 45, shown in the present instance as secured toa spring 46, that is fastened to the side of the cylinder. The action ofthis modification is substantially the same as that of the embodimentshown in Figs. 1 and 2, and the operation of the parts may be brieflyoutlined as follows: When the piston-rod 16 is elevated, the pistons 17and 18 will be moved in a corresponding direction. Liquid will thereforebe drawn into the lower barrel, and air will be in like manner suckedinto the lower portion of theupper barrel, said air finding its entrancethrough the nozzle of the combined discharge and return pipe and itspassage through said pipe, the valve-casing 37, and the conduit 42. Uponthe downward stroke the liquid will be forced from the lower barrelthrough the pipe and from the nozzle thereof. At the same time the airintroduced into the upper barrel will be expelled through the opening 44past the valve 45. This action will continue until the liquid reachesthe spout, whereupon said liquid will be intermittently returned throughthe-upper barrel.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In an oil-can pump, the combination with barrels arranged in tandem,of separate pistons operating in the barrels, an inlet to one barrel onone side of the piston, a discharge from said barrel on the same side ofthe piston as the inlet, a return having an inlet to the other barrel onthe corresponding side of thepiston thereof to the inlet and dischargeof the first-mentioned barrel, an outlet from said other barrel on thesame side of the piston as the inlet, and a nozzle having communicationwith the discharge and return and constructed to be inserted into themouth of a receiving vessel.

2. In an oil-can pump, the combination with barrels arranged in tandem,of separate pistons operating in the barrels, an inlet to one barrel onone side of the piston, a discharge from said barrel on the same side ofthe piston as the inlet, a return having an inlet to the other barrel onthe corresponding side of the piston thereof to the inlet and dischargeof the first-mentioned barrel, an outlet from said other barrel on thesame side of the piston as the inlet, and a single discharge and returnpipe having communication with said discharge and return of the barrels.

3. In an oil-can pump, the combination with barrels arranged in tandem,of separate pistons operating in the barrels, an inlet to one barrel onone side of the piston, a discharge from said barrel on the same side ofthe piston as the inlet, a return having an inlet to the other barrel onthe corresponding side of the piston thereof to the inlet and dischargeof the first-mentioned barrel, an outlet from said other barrel on thesame side of the piston as the inlet, a single discharge and returnpipe, and conduits connecting the pipe with the said discharge andreturn of the barrels and having transversely-operating valves.

I. In an oil-can pump, the combination with barrels arranged in tandem,of pistons operating in the barrels, a single discharge and return pipehaving communications with the barrels, and oppositely-arranged valvescontrolling the said communications.

5. In an oil-can pump, the combination with barrels arranged in tandem,one of said barrels having a valved fluid-inlet, the other having avalved outlet, of pistons operating in the barrels, a single dischargeand return pipe, a valved discharge connecting the barrel having thefluid-inlet and the pipe, and a valved return connecting the pipe andthe barrelhaving the outlet.

6. In an oil-can pump, the combination with a single cylinderhavingatransverse partition between its ends forming independentbarrels, of apiston-rod operatinglongitudinally in the cylinder, pistonscarried by the rod and operating respectively in the barrels, a singledischarge and return pipe, an inlet to one barrel, a discharge from saidbarrel communicating with the pipe, a return connecting the pipe and theother barrel, and an outlet from said other barrel.

7. In an oil-can pump, the combination with a single cylinder having atransverse partition between its ends forming separate barrels, of apiston-rod operating longitudinally in the cylinder and passing throughthe partition, solid pistons carried by the rod and operatingrespectively in the barrels, a single discharge and return pipe, avalved fluid-inlet to the lower end of the lower barrel, a valveddischarge connecting the lower end of the lower barrel with the pipe, avalved return-conduit connecting the pipe and the lower end of the upperbarrel, and a valved outlet communicating with the lower end of saidupper barrel. In testimony that I claim the foregoing as my own I havehereto affixed my signature in the presence of two witnesses. I

ROBERT WVARREN LAMBERT. Witnesses:

GLEM V. WAGNER, L. M. WILLIAMsON.

